Hello,
www.hikashop.com/forum/23-market-how-to/...-invoice.html#176622
The order that the customer is seeing is the store order ; it contains all products of his order and it is the order that is affiliate to your main vendor.
The vendor have a special "sub sale" order containing only his products. But the customer does not have a direct access to this order/invoice.
If you want to customize the order display in the front end you have to be sure that the customer could not have several vendors (your main vendor included).
Displaying the vendor information in the invoice means that there is only this vendor and this vendor is making the transaction (the customer is paying directly the vendor).
In latest versions, HikaMarket does override automatically the content of the "store_address" for the HikaShop custom invoice display ; that override is done when you have a cart limitation for vendors, automatically.
You can find the code in the "helper/shop/order_backend.php" file.
The part for that override starts with
if(!hikamarket::isAdmin() && $layout == 'show') {
Regards,